51154651 has 4 divisors (see below), whose sum is σ = 51230232. Its totient is φ = 51079072.

The previous prime is 51154627. The next prime is 51154657. The reversal of 51154651 is 15645115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15645115 = 5 ⋅3129023.

It is a cyclic number.

It is not a de Polignac number, because 51154651 - 2¹¹ = 51152603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51154657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36766 + ... + 38131.

It is an arithmetic number, because the mean of its divisors is an integer number (12807558).

Almost surely, 2^51154651 is an apocalyptic number.

51154651 is a deficient number, since it is larger than the sum of its proper divisors (75581).

51154651 is an equidigital number, since it uses as much as digits as its factorization.

51154651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75580.

The product of its digits is 3000, while the sum is 28.

The square root of 51154651 is about 7152.2479682964. The cubic root of 51154651 is about 371.2174433618.

Adding to 51154651 its reverse (15645115), we get a palindrome (66799766).

The spelling of 51154651 in words is "fifty-one million, one hundred fifty-four thousand, six hundred fifty-one".